<template >
	<view class="box" style="height: 1000px; background-color: white;">
		<view class="cart-container"  v-if="cart.length !== 0">
				<my-address></my-address>
				<!-- 购物车商品列表的标题区域 -->
				<view class="cart-title">
					<!-- 左侧的图标 -->
					<uni-icons type="shop" size="18"></uni-icons>
					<!-- 描述文本 -->
					<text class="cart-title-text">购物车</text>
				</view>
		
		
				<!-- 循环渲染购物车的商品信息 -->
				<!-- 商品列表区域 -->
		
		
				<uni-swipe-action>
					<block v-for="(goods, i) in cart" :key="i">
						<uni-swipe-action-item :right-options="options" @click="swipeActionClickHandler(goods)">
							<!-- 在 radioChangeHandler 事件处理函数中，通过事件对象 e，得到商品的 goods_id 和 goods_state -->
							<my-goods :goods="goods" :show-radio="true" @radio-change="radioChangeHandler" :show-num="true"
								@num-change="numberChangeHandler"></my-goods>
						</uni-swipe-action-item>
					</block>
				</uni-swipe-action>
				
				<!-- 结算区域 -->
				    <my-settle></my-settle>
			</view>
		
		<!-- 空白购物车区域 -->
		  <view class="empty-cart" v-else>
		    <image src="/static/cart_null.png" class="empty-img"></image>
		    <text class="tip-text">空空如也~</text>
		  </view>
	</view>

</template>

<script>
	import badgeMix from '@/mixis/tabbar-badge.js'
	// 按需导入 mapState 这个辅助函数
	import {
		mapState,
		mapMutations,
		mapGetters
	} from 'vuex'
	export default {
		mixins: [badgeMix],
		computed: {
			...mapState('m_cart', ['cart']),
		},
		data() {
			return {
				options:[{
					text:'删除',
					style:{
						backgroundColor: '#C00000' // 按钮的背景颜色
					}
				}]
			};
		},
		methods: {
			...mapMutations('m_cart', ['updateGoodsState', 'updateGoodsCount','removeGoodsById']),
			// 商品的勾选状态发生了变化
			radioChangeHandler(e) {
				// console.log(e) // 输出得到的数据 -> {goods_id: 395, goods_state: false}
				this.updateGoodsState(e)
			},
			numberChangeHandler(e) {
				// console.log(e)
				this.updateGoodsCount(e)
			},
			// 点击了滑动操作按钮
			swipeActionClickHandler(goods) {
			  this.removeGoodsById(goods.goods_id)
			}
		}

	}
</script>

<style lang="scss">
	.cart-container {
	  padding-bottom: 50px;
	}
	.cart-title {
		height: 40px;
		display: flex;
		align-items: center;
		font-size: 14px;
		padding-left: 5px;
		border-bottom: 1px solid #efefef;

		.cart-title-text {
			margin-left: 10px;
		}
	}
	.empty-cart {
	  display: flex;
	  flex-direction: column;
	  align-items: center;
	  padding-top: 150px;
	
	  .empty-img {
	    width: 90px;
	    height: 90px;
	  }
	
	  .tip-text {
	    font-size: 12px;
	    color: gray;
	    margin-top: 15px;
	  }
	}
</style>